Uhhhmmm, let's see. . . Ah, fearing that Clark could possibly be killed in the line of duty, or perhaps as research for a story, Clark visits a fertility clinic and has his little swimmers frozen. Thinking her husband lost forever, Lois decides to take advantage of Clark's frozen little guys- hey it does happen! Sperm is sometimes extracted from corpses so the the wife can still have her husbands children. That explanation should fly (pun intended), right?
